1. Lerner, W., Van Audenhove, F.-J.: The future of urban mobility: towards networked, multimodal cities in 2050. Public Transp. Int. 2, 14–18 (2012)
2. White Paper, Removing the Legal Obstacles to the Use of the ECU. Commission White Paper for the Council, SEC (92) 2472 Brussel (1992)
3. White Paper European Transport Policy for 2010. Time to Decide. COM (2001) 370, Brief Presentation, Brussel (2001)
4. Green Paper Towards a New Culture for Urban Mobility, COM (2007) 551, Brussel (2007)
5. White Paper, Roadmap to a Single European Transport Area—Towards a Competitive and Resource Efficient Transport System, COM(2011) 144 final, Brussels (2011)